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r <br /> interest Upon completion of the borehole drilling and collection of water samples, <br /> • the boreholes will be backfilled with grout, placed from the bottom to top of t h e <br /> borehole <br /> Field Methods - Groundwater Sampling <br /> Each exploratory boring will be sampled The ground water samples collected from <br /> the boreholes will be used for a rapid reconnaissance of the site groundwater <br /> contamination A brief summary of these procedures follows Each borehole will be <br /> advanced into the aquifer and temporarily cased for sampling Depth to groundwater <br /> measurements will be made to the nearest one-one hundredth of one foot, and also <br /> checked for the presence of separate phase product in the open borehole The water <br /> entering the borehole will be sampled using a clean bailer, and carefully poured into <br /> the appropriate laboratory prepared container with minimum cavitation Each water <br /> sample will be labeled, logged onto a chain-of-custody form, and placed in a chilled <br /> ice chest for transport to the laboratory <br /> Chemical Analpjrs <br /> Up to sixteen soil samples and up to eight groundwater samples will be analyzed at a <br /> Chromalab, Inc , a certified analytical laboratory Samples will be tested for t h e <br /> following, Total Petroleum hydrocarbons as Gasoline (TPHG), Benzene (B), Toluene <br /> (T), Ethylbenzene (E), Xylene (X), and Volatile Organic Compounds Methyl-tert-butyl- <br /> ether (MTBE), and fuel oxygenates tert-Amyl-Methyl-Ether, Ethyl-tert-Butyl-Ether, <br /> Di-Isopropyl Ether and tert-Butyl Alcohol using EPA Methods 3550, 3510/8015, 5030, <br /> • 8020 and 8260 <br /> Report <br /> A report of the findings of this site investigation will be prepared for submittal to <br /> PHS EHD The report will include the field methods, permits, exploratory boring logs, <br /> monitoring well construction details, chemical analytical data, geologic cross <br /> sections and report narrative The report will include estimates of contaminant <br /> extent, attempt to locate possible sources of mounding near MW-1, conclusions and <br /> recommendations for and feasibility of at least two alternatives for site cleanup <br /> (excluding excavatio-n) If you have any questions, please call <br /> Sincerely, <br /> Wright Environmental Services, Inc. <br /> ( 1 N° 1262 <br /> �,- I� <br /> CERTFED <br /> John Lynch Christopher M Palmer GEOLOGIST <br /> P resident HG 246, CEG 1262 <br /> attachments. Figure 1 Proposed Exploratory Boring Locations <br />